Brake mechanism for motor-vehicles.



EARMER. 1 BRAKE MEcHAmsM'fon Moron vEmcLEs. APLlcATlou msn-uml l 1s.lau! f Y Y f f Patented oct 22,1918.`

UNITED sTATEs PATENT oEEIoE.

FBANI-I. FARMER, 0F CLEVELAND, OHIO, ASSIGNOR T0 THE WHITE MOTORCOMIANY,

0]?` CLEVELAND, OHIO, A CORPORATION 0F OHIO.

BRAKE MECHANISM FOR MOTOR-VEHICLES.

Speci'cation of '.12.etters- Patent. Patented Oct. 22, 1918.

Application led November 16, 1917. Serial N o. 202,404. .A i

To all whom 35 may concern.'

Be it known that I, FRANK I-I. FARMER, a

citizen of the United States, residing at Cleveland, in the county ofCuyahoga and State of Ollio, have invented a certain new ,and usefulImprovement in Brake Mecha nisni for Motor-Vehicles, of which the`following is a full, clear, and exact description. The object 'of thisinvention is two-fold, to Wit, first, to apply braking action to a shaftwhich is a part of the power trans-- mitting mechanism of a motorvehicle, and which is respectively connected at its ends by universaljoints with a driving and a driven member of said power traiisniittingmechanism;V and, second, to rotatably support said shaftin'termcdiate'of its ends gardless of the length of said shaft, or itsinclination, `or whether it be made ofone section or of two or moresuitably connected sections.y

Mechanism having the double function stated is particularly useful inconnection with motor trucks which have to be niade of various lengthsto suit different specific uses,

because varying the length of the truck usually involves varying thelength and inclination of such a power' transmitting shaft as has beenreferred to. The invention is likewise useful in connection with a`transmitting shaft` of this sort `which is long enough to have atendency to Whip Aor bend when, in use, because it actually' prevents`such, whipping or bending. It is also adpointed tout definitely in theappended.-

claims. u

In the drawings, Figure 1 is a side eleva# tion of so `much of a motorcar as is required to show the present invention applied thereto; Fig. 2is a plan view of the mechanism shown in Fig. 1; Fig. 3 is an end j viewof 'the braking and shaft supporting mechanism of this invention, thepropeller 'shaft being sectioned in the plane of line 2-2 on Fig. 5;Fig. 44 is a side elevation of the mechanism shown in Fig. 3, and Fig. 5is a sectional side elevation of said mechanism in the plane indicatedby line 5-2-5 on Fig, 3. Y

Referring to the parts by reference characters, 10 represents thechassis frame of the motor vehicle, as a vvhole.

supported on said frame. rear end of the terminal shaft of the transmission mechanism in, said case. 14 represents the tubular rear axlecasing which is to be connected in the usual or any suitable Waywiththecliassis frame. 15 represents the forwardly projecting-end of alongitudinal shaft mounted in said rear axle frame for driving thedifferential mechanism which is commonly contained therein. All of theforegoing corresponds withfusnal and conventional practice.

A so-called propeller shaft ,is commonly employed to transinitpower fromthe shaft 13 to the shaft 15, or some equivalents of these two shafts.The propeller shaft, as shown in the drawing, is made of two sections16, 16"', which are connected, in approximate alinen'ient, by auniversal joint 17; and vsaid propellerI shaft as a whole is connectedat its ends respectively by universal joints 18, 19, with the shafts 13and 12 represents the transmission gear case `which is suitably 13represents the 15. Said propeller shaft as a whole un# l supportingmechanism includes a brake frame 30 which is formed `with a`transversely extended split sleeve 3,1.` This sleeve embraces and issupported by acylindri'cal bar or tube 2O which, at its ends, connectedwith the side members of the chassis` frameV at such points as willenable said brake frame to perform its functions, as hereinafter setforth.

-The propeller shaft passes through and is rotatably slip-ported by thisbrake f ame. By 'properly locating the har Q0 and properly tipping thebrake Iframe thereon, the mechanism carried by said brake frame maybeassociated with any part of the length of the propeller shaft; andwhen tipped to the proper angle the sleeve 31 of the brake frame isclamped upon said bar.

vIn the cxen'iplification of the invention shown in the drawing thisbrake frame embraces the propeller shaft near the rear end of the frontsection thereof. -The adjacent part 16C of said propeller shaft issquared; and the hubs 40, 41, of the brake drums 40, 41, are tted uponsaid squared part and se cured against endwise movement thereon.

VThe adjacent ends of these hubs are reduced in diameter, as shown, toform an annular recess to which is fitted the inner' ring 4Q of anantifriction ring bea1ing,the outer ring i3 of which is fixed to andsupported' by the brake franie. The inner bearing ring serves to spaceapart the two hubs referred to; and said hubs and bearing ring areclamped between the hub of the universal joint member 17, which is Hxedupon the rear end of said propeller shaft section, and a screw collarclamp 39 which screws onto the shaft member 16 just in front of thefront drum hub.

Two dust washers 37 are fixed to the brake frame on opposite sides ofthe said ring bearing, and they, or rather, the packing rings B8 whichthey carry, embrace and slid- .ingly tit said hubs.

Twocurved brake leversO, 51, are piv otcd to the brake frameabove thebar 20 on pivots which extend longitudinally of the chassis frame. Thesetwo brake levers extend down on opposite sides of the two brake drums;each of these brake levers has two curved arms a, Z), which arerespectively adjacent the two brake drums; and these two arms are mergedtogether at their lower ends 50, 51", .between the brake drums. Each arm0,2), ot' each brake lever has a brake shoe 52 pivoted to it forengagement with the adjacentbrake drum. Each brake lever arm carries`two adjustment screws 55 for engagement with its brake shoe above andbelow the pivot li eri-ot, so nat it may be properly positioned withrespect to the adjacent brake drum. n

Means are provided for drawing together the lower ends of these twobrake levers so as to cause the brake shoes referred to to friction-allyengage the. two brake drums, said means also being of such characterthat, when such action is permitted, the lower ends of the two brakeleversI will be thrust apart so as to diseugage the brake shoes from thebrake drums. In the construction shown a transversely extended rod (S0goes through and is slidably supported by an arm which extends downwardfrom and is s. part ot the brake frame 30. At one end this rod goesloosely through a hole' in the lower end 5l ofthe brake lever 51. Theprojecting end of this rod is threaded and an adjustment uut G1 isscrewed thereonto into. engagement with the outer face of the brakelever enil'lc. A coiled spring 62 embraces this rod and is compressedbetween two collars 63, 64, slidahly mounted thereon, one of whichengages the brake frame arm 35 and the other the inner face of the brakelever end 51, The opposite end of this rod passes through a slot in thebrake lever end 50% An operating lever is pivotally connected with theprojecting end of this rod 60 and with an ear 54 which is a part ot' thebrake lever 50; and this lever has an operating arm 71 to which may beapplied any suitable mechanism for operating it for the purpose ofcausing the braking. action ot scribed brake mechanism.

Another coiled spring 66 surrounds this rod and is compressed betweentwo .collars 67, 68, slidably mounted thereon, one of which engages thebrake frame arm 35 and the other ot" which engages the inner face of thebrake lever end 50c.

Having described my invention, I claim 1. In a motor vehicle, thecombination of a propeller shaft whichiis connected at its endsrespectively by universal joints with a driving member and a drivenmember of the powertransmitting n'ieehanism, a. brake frame supported bythe vehicle frame, and rotatably supporting said propeller, shaft,` anadjacently placed brake drum iixed to said propeller-shaft, and brakemechanism supported on said brake frame.

2. In a motor vehicle, the combination ot'l brake shoes mounted on eachbrake lever for engagement with the two brake drums, mechanism fordrawing the free endsof said brake levers toward eachother to cause' thebrake shoes to engage the brake drum, and means normally thrusting thelevers apart to disengage the brake shoes from said brake drulns.

3. In a motor vehicle, the combination of a longitudinally extendingpropeller shaft whose ends are respectively connected by universaljoints' with a driving and a. driven member of the power transmittingmechanism, two brake drums fixed upo`n said propeller shaft, a brakeframe through which the dethe hubs 0f both brake drnnis und thu unter'ring nl' which is snppnrl'nd hy l*nid ln'nlm two lirdudrinnl lixvd tinmid prnprllt'r slm l`t un 0ppm-llt' sldvs nl -snld ln'nlnl drinn, :in

nnlil'rivliun ringr lwnring whim. innvr ringr vindnu-Irvs :ind-is lixvdtu thu hnlm nl l-Jnth of snl'il lil-:ikv d'lnns :uid whosu nid-ur ringis fixed tn und snppm'tnrl hy said brake frznnti,

-dnstfn'nslivrs whivh im! lixtd to thu brake T. l. Ihm), ll. (l.llltilnin'.

